Lenovo Yoga 7 2-in-1 died

I've had it 18 months and it was fine yesterday. Today I open it and it's dead. The charging light is white, but absolutely no light from the power button. No fan movement, no clicking, flickering, nothing.

I've tried the pinhole reset button, I unplugged the battery, I tried a million different hard resets, I tried starting it just on AC power, I tried plugging in an hdmi cable, etc. The warranty went out in January and I'm an idiot for not paying the fee to extend it. I've tried every method, but all signs point to motherboard death. I see a few other posts talking about their Lenovos going out the same way, so I guess I just came to vent.

Anyone else experienced this? Never purchasing a Lenovo again. I'd heard great reviews but all my tax documents from this year and my college assignments and certificates were on this laptop. Absolutely devastating.